Hoist.



No. 892,896. PATENTED JULY 7, 1908.

n. E. ROWLAND.

HOIST.

' APPLIOATIOII mam mn.12.1eos.

'UNITED STATES PATENT OFFICE.

DAVID E. ROWLAND, OF CANTON, OHIO, ASSIGNOR TO THE NEY MANUFACTURING COMPANY OF CANTON, OHIO, A CORPORATION OF OHIO.

HOIST.

To all whom it may concern:

Be it known that I, DAVID E. ROWLAND, a citizen of the United States, residing at Canton, in the county of Stark and State of Ohio, have invented certain new and useful Improvements in Hoists; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing, making a part of this specification, and to the numerals and figures of reference marked thereon, in which Figure 1 is a side elevation of a sheave, showing the different parts properly attached. Fig. 2 is a vertical section of the sheave and sheave pulley, showing the rope clamped and the different parts for clamping the rope in section. Fig. 3 is a detached view of the bolt designed to hold the slotted segmental bar in fixed adjustment. Fig. 4 is a detached perspective view of the segmental bar. Fig. 5 is a detached view of the connecting link between the segmental bar and the rope clamping segment. Fig. 6 is a detached View of the rope clamping segment. Fig. 7 is a detached view of the sheave pulley, the rope arm and its connected flanges. Fig. 8, is a full section taken on line 88, Fig. 2,

except the elevating rope is not shown.

The present invention has relation to hoists and it consists in the different parts and combination of parts hereinafter clescribed and particularly'pointed out in the claims.

Similar numerals of reference indicate corresponding parts in all the figures of the drawing.

In the accompanying drawing, 1 represents the sheave-block, which may be substantially of the form shown in Fig. 1, and as shown it is provided with the cross-bolt 2, upon which cross-bolt is mounted the grooved pulley 3. The sheave block 1 is provided with the eye 4, which is for the purpose of connecting-the suspending hook 4. The swinging ro e arm 5 is pivotally attached to the cross bo t 2 by means of the arm 6. The rope arm 4 is formed hollow for the purpose of receiving the operating rope 7 through which arm the rope passes. The rope arm 5 is provided with the flanges 8 to which is pivotally attached the rope locking segment 9, which rope locking segment is provided with the groove 10, which groove is provided with Specification of Letters Patent.

Application filed March 12, 1908.

Patented July '7, 1908.

Serial No. 420,537.

the ridges 11, which ridges are for the purpose of securely holding the rope 7 when said looking segment is brought into contact with the rope as hereinafter described. The rope locking segment 9 is'provided with the arm 12, to which is pivotally attached the link 13, which link is pivotally attached to the ears 14 formed upon the segmental bar 15 which segmental bar is curved and should correspond substantially with the curvature of the bridge portion 16 of the sheave 1. In use it is frequently desirable to bring the rope arm 5 into substantially a horizontal position, or at almost right angles to a vertical line, and in order to provide for this adjustment the segmental bar 15 is provided and is formed of considerable length and located concentrically with the grooved pulley 3 so that said curved arm can be moved to any desired point of adjustment within the limits of its movements and held in the desired adjustment by means of the clamping bolt 17, which clamping bolt passes through the bridge portion 16 and the curved bar 15 locked or clamped by means of the nut 18. The bridge or connecting flange or portion 16 is provided upon its underside with the downward extended shoulder 16* which shoulder is for the purpose of engagement with the top of the curved or segmental bar 15, and if the nut 18 is tightened the bar will be slightly rocked by reason of the contact as between said bar and the flange 16 so that the lateral flanges 15 will be forced into snug contact with the upper edges of the sheave block 1. This feature being best illustrated in Fig. 8.

It will be understood that as the clamping bolt elevates the segmental bar 15, after it has come in contact with the shoulder 16 it will lower the flanges 15 and thereby roduce a sufficient friction to assist in 1101 ing the segmental bar 15 against movement and remove a portion of the strain from the clamping bolt. Another advantage in providing the frictional contact is, that as the rope arm 5 is elevated the force will be to a certain extent against the sheave block 1, owing to the fact that the flanges 15 are located just below the pivotal point of the link 13. It will also be understood that the position of the pivotal pointof the link 13 with reference to the segmental bar 15 never varies regardless of the adjustment of the rope arm 5 and the segmental bar 15 owing to the'fact that the link together with the rope locking segment follows the movement of the segmental bar 15.

It will be understood that the rope locking segment 9 is carried with the hollow rope arm 5 so that by the swinging of the rope arm upon the cross bolt 2 will lock and unlock the rope regardless of the adjustment of said rope arm. In practice the clamping bolt 17 is released after which the rope arm 5 'is brought into the desired adjustment after which the segmental bar 5 is clamped and the rope arm held in proper position, refer ence being had to the predetermined position to which said rope arm is to be brought.

It will be understood that the rope arm 5 will have a limited swinging movement independent of the curved bar 15 which independent swinging movement aotuates the rope locking segment 9 and when the rope arm 5 is brought toward the'sheave or pulley 2, the locking segment 9 is released from the rope and when said rope arm is swung away from the sheave the locking segment will bebrought into contact with the rope and lock or clamp the rope by reason of the action upon the arm 12 of the locking segment 9. After the locking segment 9 has been brought into engagement with the elevating rope any downward pull of the elevating rope caused by the weight carried by said rope will have a tendency to draw the locking segment and better clamp the rope, thereby holding the load against downward movement, and by the movement of the rope arm 5 the load can be stopped and held at any desired point of travel of the load. The purpose of providing adjustment of the rope arm by means of the pivotal connection upon a bolt 2 is to allow the rope arm to be brought into any desired angle to a vertical line, thereby allowing the elevating rope to be actuated regardless of its inclination to a vertical line. In many instances it is diflicult to actuate the rope arms while loads of great bulk are being elevated and hence it is necessary to adjust the rope arm from time to time and hold said arm in fixed adjustment. By providing the curved arm 15 I .am enabled to provide a wide range of adjustment and thereby set the rope arm at any angle below a horizontal line desired, that is to say said rope arm can be adjusted to nearly a right angled position to a vertical line, and brought into nearly a parallel position with the vertical line and at the same time giving the limited swinging movement necessary to lock the rope regardless of its fixed adjustment concentric with the bolt 2.

It will be understood that the locking bolt 9 should be grooved and its grooved surface formed with suitable ribs or ridges of sufficient size and formation to frictio-na'lly hold Having fully described my invention what I claim as new and desire to secure by Letters Patent, is

1.- In a hoist, the combination of a sheaveblock, a grooved pulley carried by said sheaveblock, a rope arm pivoted concentrically with the grooved pulley, a rope-gripping segment pivotally attached to the rope arm, a curved bar provided with a slot and adjustable concentrically with the pulley, means for holding the curved arm in fixed adjustment, and a link pivoted to the curved arm and to the rope grip respectively, substantially as and for the purpose specified.

2. In a hoist, a sheave-block having ournaled thereto a grooved pulley, an elevating rope located upon the grooved pulley, a swinging arm, a rope locking segment carried by said swinging arm, an adjustable curved arm located concentrically with the grooved pulley, means for holding the curved arm in fixed adjustment and a link adapted to actuate the rope locking segment simultaneously with the swinging movement of the rope arm, substantially as and for the purpose specified.

3. In a hoist, a sheave block having jourrope located upon the grooved pulley, a swinging arm, a rope locking segment carried by said swinging arm, an adjustable curved arm carried by the sheave block, a link pivotally connected to said curved arm, and looking segment, a shoulder adapted for contact with the curved arm and flanges located upon the curved arm, and adapted for contact with the sheave block and a clamp bolt located through the slotted curved arm and the sheave block, substantially as and for the purpose specified.

4. In a hoist, the combination of a sheave block, a pulley carried by said sheave block, a swinging arm and an elevating rope located through said swinging arm and a locking se ment carried by said swinging arm, an a justable curved arm, a shoulder located above the adjustable curved arm and ada t ed for contact therewith, lateral flanges ocated upon said adjustable curved arm and adapted for contact with the sheave block, a clamping bolt adapted to hold the curved arm in adjustment and a link pivoted to the curved arm and rope locking segment, substantially as and for the purpose specified.

5. In a hoist, the combination of a sheaveblock, a grooved pulley carried by said sheave block, a rope arm pivoted to said sheave block, a rope-gripping segment pivotally attached to the rope arm, a curved bar provided with a slot and adjustable concentrically with the pulley, means for holding the curved arm in fiXed adjustment and a link pivoted to the curved arm and to the rope grip, respectivel substantially as and the rope.

for the purpose speci ed.

naled thereto, a grooved pulley, an elevating.

6. In a hoist, the combination of a sheavearm in fixed adjustment, substantially as and 10 block, a grooved pulley carried by said for the purpose specified. sheave-block, an elevating rope, and a rope In testimony that I claim the above, I arm pivotally attached to the sheave-block, have hereunto subscribed my name in the a rope grip carried by the rope arm, an adpresence of two Witnesses.

justable arm having pivotally connected DAVID E. ROWLAND. thereto a link, said link pivoted to the rope Witnesses: grip, and the link adjustable with the curved J. A. JEFFERS.

arm, and means for holding the adjustable F W BOND 

